IHI NIIGATA MG(L)26HLX, Инструкция по эксплуатации

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SECTION
４
- DISASSEMBLY AND REASSEMBLY
4.4 FUEL INJECTION VALVES AND FUEL INJECTION
PUMPS
４－４－０１
4.4 FUEL INJECTION VALVE AND FUEL INJECTION PUMP
4.4.1 Injection valve
WARNING
There is a danger of injuries caused if high-pressure oil droplets come in direct
contact with your skins when conducting the injection test of fuel injection pump.
Never allow your body to gain access to the range covered by oil droplets.
In case where high-pressure oil droplets have come into your body through the
skin, then it is necessary to undergo forthwith specialist's diagnosis and surgical
treatment.
CAUTION
When using hydraulic tools or when conducting the fuel injection valve injection
test, high- pressure fluid will gush out , leading to the danger of injuries.
Never allow your body to gain access to the range covered by oil droplets.
In case where high-pressure oil droplets have come into your body through the
skin, then it is necessary to undergo forthwith specialist's diagnosis and surgical
treatment.
Apply hydraulic pressure only after making sure that joints are securely connected.
Be sure to put on safety goggles in carrying out the following items of work being
in danger of injury to eyes.
・
When handling fuel oil
・
In course of fuel injection valve injection test
Each fuel injection valve consists of a forged steel body, an injection
nozzle, and an injector pressure regulating mechanism. The diameter, number
of spray holes, and angle of the holes in the nozzle are selected to provide
optimum performance for the particular rating being used. For those
applications where heavy fuel is used, the nozzles are water-cooled to reduce
the rate of carbon buildup on the tips.
The injection valves should be checked every 1500 hours for spray pattern,
・
leakage, and opening pressure. Procedures are give below.
Special tools supplied
Tools are supplied for removing the injector valves,cleaning the nozzle tips,
and for pressure/leakage testing of the valves.
Injection valve Removal
- Remove the fuel inlet pipe
①
.
- Remove the injection valve retainer
②
.
- Install the puller (Tool “A”) and lift injector from its bore.